Question

Which equation could be used to find the measure of one acute angle in the right triangle shown below?

A. sin A equals 4 over 5
B. tan A = 5 over 4
C. cos B = 5 over 4
D. tan B = 4 over 5

Answer 1

@JakeV8

Answer 2

well, since you are only given one "leg" side and the hypotenuse, you need to think only about sine and cosine. Tangent requires you to know "opposite over adjacent" and you don't have the other leg length easily available.

Answer 3

That leaves answers (A) and (C)

sin A = opposite / hypotenuse

cos B = adjacent / hypotenuse

Fill in the numbers for each ratio... only one will match what's shown in the answers.

Answer 4

a.